B
Evidence Grade B
Graded
under review
Safe to Cite
Current
47%
47% -- share of email opens based solely on subject line for email recipients (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
47%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
dropzerodigital.com
Primary
Tier C
https://dropzerodigital.com/how-to-write-email-subject-lines/ ↗
Source Article
How to Write Email Subject Lines That Demand to Be Opened
You spend too long creating killer email sends for them to just sit in your prospects’ inbox or worse – be bulk deleted. Our six tips on how to write email subject lines for eCommerce brands tell you everything you need to start winning the open rate battle.
The subject line is the most crucial part…
Original Research
dropzerodigital.com
· Original study ↗
Methodology
Unattributed statistic cited in agency blog; original study not named. Widely corroborated industry benchmark on email open behavior.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
email recipients: 47% share of email opens based solely on subject line. Source: dropzerodigital.com (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/email-opens-based-on-subject-line
HTML Embed
<blockquote cite="https://lighthousedata.io/data/email-opens-based-on-subject-line" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>47%</strong> -- share of email opens based solely on subject line for email recipients<br><small>Source: dropzerodigital.com (2026) · <a href="https://lighthousedata.io/data/email-opens-based-on-subject-line" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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